Drafting pen and ink cartridge therefor



May z2, 1962 B4. CHOLET DRAFTING PEN AND INK CARTRIDGE THEREFOR Filed April 25, 1958 ATTNEYS United States Patent Office 3,035,742 Patented May 22, 1962 3,035,742 DRAFTING PEN AND INK CARTRIDGE THEREFOR Bertram Cholet, 252 Harrison Ave., Hasbrouck Heights, NJ. Filed Apr. 23, 1958, Ser. No. 730,394 1 Claim. (Cl. 222-213) a drafting pen such as india ink which dries rapidly, an ink cartridge is provided having a discharge orifice and.

with an orifice closure member extending longitudinally of the cartridge with the lower end thereof protruding through the discharge orifice and provided with an enlarged terminal which is biased into closed relation with the discharge orifice and which is moved to open relation therewith by manual pressure applied thereto.

The invention comprehends a cartridge in the form of a barrel having a reduced lower end provided with `a discharge orifice and a llling opening which is closed by a screw cap and with an orifice closure member arranged in said barrel and provided with a reduced portion protruding through said discharge orifice and formed with an enlarged terminal which is normally biased into closed relation with the discharge orifice. The said cartridge may constitute the barrel or handle of the pen or the same may be independent thereof and constitute an ink dropper for supplying ink as desired to any drafting instrument using ink.

An object, therefore, of the invention is to provide a cartridge of said character for supplying ink las desired to any drafting instrument using ink.

Another object of the invention is to provide an oritice closure member which is formed with a bowed spring portion and with a reduced end portion arranged in protruding relation through the discharge orifice and with an enlarged extremity normally closing the discharge orifice by the bias of said bowed portion and which bowed portion is adapted to be elongated by pressure applied to the cartridge for moving the enlarged extremity out of closed relation with the discharge orifice.

Still another object of the invention is to provide an orifice closure member of said character which is internally afnxed to the barrel and is axially slideable at its lower end through the discharge orifice.

Still another object of the invention is to provide a drawing pen with a cartridge of said character which constitutes the barrel thereof and is arranged wtih the discharge orifice located between the spring blades of the pen.

With the foregoing and other objects in View, reference is now made to the following specification and accompanying drawings in which the preferred embodiments of the invention are illustrated.

In the drawings:

FIG. 1 is a view in elevation of an ink cartridge constructed in accordance with the invention.

FIG. 2 is a vertical sectional View taken approximately on line 2-2 of FIG. 1.

FIG. 3 is a side view of the spring member located within the cartridge for normally closing the discharge end of the cartridge.

FIG. 4 is a sectional view taken approximately on line 4 4 of FIG. 2.

FIG. 5 is a vertical sectional view of a pen provided Ywith a cartridge constructed in accordance with the invention.

FIG. 6 is a. vertical Sectional view of a pen provided with a cartridge embodying a modified form of the in.

vention.

FIG. 7 is a fragmentary vertical -sectional view taken approximately on line 7-7 of FIG. 5.

FIG. 8 is a fragmentary vertical sectional view taken approximately on line 8--8 of FIG. 6.

Referring to the form of the invention illustrated in FIGS. 1 to 4 of the drawings, the invention is illustrated in its application to a cartridge 10 which is of general cylindrical formation having a reduced lower end 11 provided with a discharge orifice 12 and with a filling opening which is closed by a threaded cap 13.

Arranged within the cartridge is an orifice closure member 14 which is secured to the cartridge at the upper endV thereof and is provided with fa free lower end which protrudes through the discharge orifice `and is formed 'withv an enlarged terminal 15 normally setting on the reduced end 11 for closing the discharge orifice.

end 17 and integrally connected therewith is ya cylindrical lower portion 18 of lesser cross-sectional Iarea than that of the discharge orifice through which the same protrudes with the enlarged terminal 15 on the protruding end thereof. 'I'he offset upper end 17 extends into a notch 19 in the upper end of the cartridge and is retained in position therein by the tightening of the cap 13 on the cartridge. This positions the said closure member 14 in engagement with the inner surface of the cartridge at three longitudinally spaced points. The bowed portion 16 bears against the inner face of the cartridge substantially medially of the length thereof while the upper end of the closure member engages `against the inside surface of the cartridge adjacent the filling opening and the cylindrical lower portion 18 bears against the inside face of the cartridge adjacent the `discharge orifice 12. The wall of the cartridge centrally of the bowed portion 16 is preferably of flattened formation on the inner and outer surfaces thereof as at 20 whereby the bowed portion atly engages against a at portion of the wall of the cartridge. The said bowed portion 16 is of resilient material and is upwardly biased to normally retain the terminal 15 in seated engagement on the reduced lower end 11 to close the discharge orifice 14. The cartridge 10 is composed of a material which permits of the inward exing thereof in the said flattened portion 20 to thereby effect flexing of the bowed portion 16 so as to elongate the'same and move the cylindrical portion 18 thereof axially of the discharge orice so as to open the discharge orifice and permit of the discharge of ink from the cartridge.

The cartridge 10 is adapted for use as an ink dropper for supplying ink as desired to a drafting pen between the blades thereof. However, a cartridge constructed in accordance with the invention may form the handle of a fountain pen as illustrated in the forms shown in FIGS. 5 to 8 of the drawings. In the form shown in FIGS. 5 and 7, the drafting pen has a handle 25 providing a cartridge which is of generally cylindrical formation having a reduced lower end 26 formed with a discharge orifice 27 and with an open upper end which is closed by a screw cap 28. 'Ihreadedly secured to the cartridge adjacent the reduced lower end 26 is a tubular member 29 having tapered spring blades 30 and 31 which are engaged by a threaded screw 32 for adjustably spacing the points of the blades. Arranged within the cartridge is an orifice closure member 34 similar to the closure member 14 in the previous form of the invention. The said closure member includes a bowed intermediate portion 35 fashioned from a strip of flat sheet material which terminates at its upper end in an offset portion 36 and with a cylindrical lower end portion 37 of lesser cross-sectional area than that of The orifice clo-` sure member 14 includes a bowed intermediate portion 16 of fiat formation which terminates in an oflset upper ply of the ink to the spring blades.

the discharge orifice through which the same freely protrudes with an enlarged terminal 38 on the protruding end thereof.

The orifice closure member 34 is disposed in engagement with the inner face of the cartridge adjacent the offset portion 36 and adjacent the cylindrical portion 37 and also intermediate the bowed portion 35. The offset portion 36 is secured in a notch 40 in the upper end of the cartridge by the screw cap 28 and the handle or barrel 25 is preferably of attened formation as at 38 in the region of the bowed portion 35 and the cartridge is composed of a material which permits of the inward exing of the flattened portion to thereby effect flexing of the bowed portion 35 so as to elongate the same and move the portion 37 axially of the orifice 27 so as to move the enlarged terminal 39 out of seated engagement on the lower end 26 to permit of the -discharge of the ink from the cartridge.

In the form shown `in FIGS. 6 and 8 of the drawings, a drafting pen is provided with a handle 46 constituting an ink cartridge which is of general cylindrical formation having a reduced Vlower end 47 provided with a discharge orifice 48 and with a filling opening at its upper end which is closed by an apertured disk 49 and a `threaded cap 50.

Threadedly secured to the lower end of the Yhandle or cartridge is an interiorly threaded tubular member 51 having tapering spring blades 52 and 53 which are threadedly engaged by a screw 54 for adjusting the spacing of the points thereof. Arranged within the cartridge is an orifice closure member y55 which in this form consists of a wire member extending longitudinally of the cartridge and protruding through the cap and the reduced lower end thereof. The protruding upper end is provided with an enlarged head 57, while the protruding lower end is provided with an enlarged terminal 58 which normally seats on ythe reduced lower end 47 to close the discharge orifice 48. Located between the cap and the disk is a coil compression spring 59 disposed in surrounding relation with the closure member S and which is Vtensioned against the disk 49 at its lower end and at its upper end is tensioned against an abutment element 60 aixed to lthe closure member, which spring biases said member to dispose the terminal 58 in seated engagement on the discharge orice.

In the form illustrated in FIGS. 5 and 7 of the drawings the reduced lower end 26 of the cartridge extends arcuately to one side of the longitudinal axis thereof so as to clear the screw 32 which adjustably connects the blades and with Ythe discharge orifice 27' located adjacent the blade 30 for depositing ink thereon when the closure member is moved to open relation. kSimilarly in the form shown inFIGS. 6 and 8 of the drawings, the reduced lower end 47 of the cartridge extends arcuately to one side of the longitudinal axis thereof so as to clear the screw 54 and with the discharge orice 48 located adjacent the blade 52. It will be understood that the extent of movement ofthe lower end of the closuremember with reference to the discharge orifice in each of the severalY forms of the invention is relatively small. An opening movement of the enlarged terminal from its seat of gg to 1/16 of an inch is suflicient to permit of an adequate sup- It will be understood also that when pressure is applied to the cartridge to ilex the bowed portion of the orifice closure member in the i form shown in FIGS. Y1 to 4 and in the form shown in FGS. 5 and 7 of the drawings, pressure is created in the ink supply within the cartridge which functions to forcibly effect the discharge of a small quantity of the ink with the movement of the enlargedterminal to open relation.

The reduced lower end 37 of the orifice closure member in the form'shown in FIGS. 5 and 7 of the drawings and the lower end of the wire member in the form shown in FIGS. 6 and 8 of the drawings are sufhciently flexible to readily follow the `curved passageway in the reduced lower ends of the ink cartridges or handles in these forms of the invention.

The drafting instruments shown in FIGS. 5 and 7, and FIGS. 6 and 8 of the drawings illustrate the use of ruling type spring blades. It is to be understood, however, that any type of scribing device may be employed such as a lettering nib or artists sketch nib.

While the preferred forms of the invention have been shown and described herein, it is to be understood that the same is not so limited but shall cover and include any and all modifications thereof which fall within the purview of the claims.

What is claimed is:

In an ink cartridge for supplying ink to a drafting instrument, a tubular member having an open end for lling the same with ink and a discharge end formed with a discharge orice, a cap closing the open end of said tubular member, an orifice closure member of flat sheet material having a resilient bowed intermediate portion and end portions, said end portions being disposed against the inner face of said tubular member at longitudinally spaced locations on one side thereof and said bowed portion being disposed against the inner face of said tubular member intermediate said spaced locations and onthe side opposite from said one side and with one end por-tion thereof extending freely through said orifice and formed with a closure terminal on the protruding end thereof larger than the discharge orifice and closing said orifice; said orifice closure member having its other end portion offset and secured in a notch in said tubular member by said cap to thereby retain said oset end in fixed position Within said tubular member with the bowed portion thereof being free to flex and bend by pressure thereagainst for imparting axial movement to said one end portion with reference to said orifice, said bowed portion biasing the closure terminal in-to seated engagement against said discharge end of said tubular member to close said orifice, and said tubular member having a flattened resilient portion in the region of said bowed portion to effect flexing of said bowed portion by pressure appliedragainst said tubular member for moving said closure terminal from its seat for the discharge of ink from said tubular member.

References Cited in the file of this patent UNITED ,STATES PATENTS 341,001 Hall May 4, 1886 445,944 Birkmire Feb. 3, 1891 1,051,968 Petrie Feb. 4, 1913 2,121,354 Johnson lune 21, 1938 FOREIGN PATENTS 55,831 Germany Apr. 8, 1891 

